Experimental Evidence of Chiral Symmetry Breaking in Kekulé-Ordered Graphene

Changhua Bao; Hongyun Zhang; Teng Zhang; Xi Wu; Laipeng Luo; Shaohua Zhou; Qian Li; Yanhui Hou; Wei Yao; Liwei Liu; Pu Yu; Jia Li; Wenhui Duan; Hong Yao; Yeliang Wang; Shuyun Zhou

doi:10.1103/PhysRevLett.126.206804

Experimental Evidence of Chiral Symmetry Breaking in Kekulé-Ordered Graphene

Changhua Bao, Hongyun Zhang, Teng Zhang, Xi Wu, Laipeng Luo, Shaohua Zhou, Qian Li, Yanhui Hou, Wei Yao, Liwei Liu, Pu Yu, Jia Li, Wenhui Duan, Hong Yao, Yeliang Wang, Shuyun Zhou^*

^*此作品的通讯作者

集成电路与电子学院

科研成果: 期刊稿件 › 文章 › 同行评审

80 引用（Scopus）

摘要

The low-energy excitations of graphene are relativistic massless Dirac fermions with opposite chiralities at valleys K and K′. Breaking the chiral symmetry could lead to gap opening in analogy to dynamical mass generation in particle physics. Here we report direct experimental evidences of chiral symmetry breaking (CSB) from both microscopic and spectroscopic measurements in a Li-intercalated graphene. The CSB is evidenced by gap opening at the Dirac point, Kekulé-O type modulation, and chirality mixing near the gap edge. Our work opens up opportunities for investigating CSB related physics in a Kekulé-ordered graphene.

源语言	英语
文章编号	206804
期刊	Physical Review Letters
卷	126
期	20
DOI	https://doi.org/10.1103/PhysRevLett.126.206804
出版状态	已出版 - 19 5月 2021

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title = "Experimental Evidence of Chiral Symmetry Breaking in Kekul{\'e}-Ordered Graphene",

abstract = "The low-energy excitations of graphene are relativistic massless Dirac fermions with opposite chiralities at valleys K and K′. Breaking the chiral symmetry could lead to gap opening in analogy to dynamical mass generation in particle physics. Here we report direct experimental evidences of chiral symmetry breaking (CSB) from both microscopic and spectroscopic measurements in a Li-intercalated graphene. The CSB is evidenced by gap opening at the Dirac point, Kekul{\'e}-O type modulation, and chirality mixing near the gap edge. Our work opens up opportunities for investigating CSB related physics in a Kekul{\'e}-ordered graphene.",

author = "Changhua Bao and Hongyun Zhang and Teng Zhang and Xi Wu and Laipeng Luo and Shaohua Zhou and Qian Li and Yanhui Hou and Wei Yao and Liwei Liu and Pu Yu and Jia Li and Wenhui Duan and Hong Yao and Yeliang Wang and Shuyun Zhou",

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year = "2021",

month = may,

day = "19",

doi = "10.1103/PhysRevLett.126.206804",

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T1 - Experimental Evidence of Chiral Symmetry Breaking in Kekulé-Ordered Graphene

AU - Bao, Changhua

AU - Zhang, Hongyun

AU - Zhang, Teng

AU - Wu, Xi

AU - Luo, Laipeng

AU - Zhou, Shaohua

AU - Li, Qian

AU - Hou, Yanhui

AU - Yao, Wei

AU - Liu, Liwei

AU - Yu, Pu

AU - Li, Jia

AU - Duan, Wenhui

AU - Yao, Hong

AU - Wang, Yeliang

AU - Zhou, Shuyun

PY - 2021/5/19

Y1 - 2021/5/19

N2 - The low-energy excitations of graphene are relativistic massless Dirac fermions with opposite chiralities at valleys K and K′. Breaking the chiral symmetry could lead to gap opening in analogy to dynamical mass generation in particle physics. Here we report direct experimental evidences of chiral symmetry breaking (CSB) from both microscopic and spectroscopic measurements in a Li-intercalated graphene. The CSB is evidenced by gap opening at the Dirac point, Kekulé-O type modulation, and chirality mixing near the gap edge. Our work opens up opportunities for investigating CSB related physics in a Kekulé-ordered graphene.

AB - The low-energy excitations of graphene are relativistic massless Dirac fermions with opposite chiralities at valleys K and K′. Breaking the chiral symmetry could lead to gap opening in analogy to dynamical mass generation in particle physics. Here we report direct experimental evidences of chiral symmetry breaking (CSB) from both microscopic and spectroscopic measurements in a Li-intercalated graphene. The CSB is evidenced by gap opening at the Dirac point, Kekulé-O type modulation, and chirality mixing near the gap edge. Our work opens up opportunities for investigating CSB related physics in a Kekulé-ordered graphene.

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DO - 10.1103/PhysRevLett.126.206804

M3 - Article

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SN - 0031-9007

VL - 126

JO - Physical Review Letters

JF - Physical Review Letters

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ER -

Experimental Evidence of Chiral Symmetry Breaking in Kekulé-Ordered Graphene

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